A novel 3D electric field sensor which based on flexible substrate and 3D assembling way is presented.Through folding flexible substrate

a novel 3D electric field sensor with orthogonal structure is formed. Coupling while measuring spatial electric field is researched

decoupling algorithm is proposed

and sensitivity matrix is calibrated to realize accurate measurement of X

Y

Z direction components of spatial electric field; through a series of humidity and temperature experiment

research on deformation of 3D structure

prove the structure of 3D electric field sensor is stable and reliable. Experimental results show that the 3D electric field sensor can not only eliminate coupling interference

realize accurate measurement of spatial electric field component

measurement errors is within 3. 61 %

but also greatly reduce folding technology

mass the volume by new 3D assembling way

folding craft simplify assembling of 3D sensor

which is in favor of batch production.